Clarkia affinis is a species of wildflower known as chaparral clarkia. It is endemic to California, where it grows mainly on chaparral slopes and woodlands in the Coast Ranges. This is a spindly plant producing erect stems exceeding half a meter in height and sparse narrow leaves. The flower is a bowl-shaped bloom with four pink or red petals each 5 to 15 millimeters long. The petals may have darker spots near the base and purple or red speckling.

The whimsical name of this pretty, vibrantly-colored Clarkia comes from its late spring to early summer bloom time. It flowers in shades ranging from pink to purple. Farewell to Spring attracts bees and butterflies and is a favorite plant in native pollinator and cut-flower gardens.

A member of the Evening Primrose family, Farewell to Spring is a self-seeding annual that tolerates a wide range of soil conditions. It has low moisture needs and requires minimal watering once established.

Aurorar farewell-to-spring (Clarkia amoena 'Aurora') is a peach-colored horticultural selection of Clarkia amoena, a native annual wildflower in the evening primrose family (Onagraceae). Native to coastal hills and mountains from British Columbia south to the San Francisco Bay Area, this species grows in open grasslands, coastal scrub, and woodland edges.

Like other farewell-to-spring varieties, this plant blooms from late spring into early summer. 'Aurora' features large, cup-shaped flowers in soft peach tones, a contrast to the pinks and purples more common to the species.

Aurora farewell-to-spring tolerates a wide range of soil types and requires little water once established. It is self-seeding and often reappears in the garden each year. It attracts bees and butterflies and adds bright seasonal color to meadow plantings, borders, or native cottage gardens.

Farewell To Spring (Clarkia amoena ssp. huntiana) is a native annual herb that grows in central and northern California. It tends to grow in spring-moist, open places, at elevations from 0-2300 feet.

Farewell To Spring (Clarkia amoena ssp. whitneyi) is a rare native annual herb that grows in Northern California, primarily in the North Coast, the Klamath Mountain Range and North Coast Range regions. It tends to grow in spring-moist, open places, at elevations from 0-2300 feet.

Clarkia arcuata is a species of flowering plant in the evening primrose family known by the common name hairy clarkia. It is endemic to California, where it grows in the chaparral and woodlands of the foothills of the Sierra Nevada and southern Cascade Range. It is an annual herb producing a slender, erect stem often exceeding half a meter in height. The leaves are narrow, usually linear or lance-shaped, and up to 6 centimeters long. The flower cluster bears a few flowers, which dangle when they are buds and grow erect as they open. The sepals stay fused as the petals open and emerge from one side. They are coated in hairy hairs. The petals are up to 3 centimeters long, pink-lavender in color, sometimes with a reddish blotch at the base. They form a bowl-shaped corolla. There are 8 stamens and a protruding, four-chambered ovary. The fruit is an elongated capsule which may reach 3.5 centimeters long.

Clarkia australis is a species of flowering plant in the evening primrose family known by the common name Small's southern clarkia. It is endemic to California, where it grows in the forests of the central Sierra Nevada. It is an uncommon species threatened by such forest activities as logging. This annual herb produces a slender, erect stem approaching a meter in height. The leaves are widely linear in shape and borne on short petioles. The top of the stem is occupied by the tall inflorescence, which bears hanging buds that open from the lowest upward, so that there are several closed buds above open flowers. The sepals do not remain fused as the flower opens. The petals are diamond-shaped and sometimes lobed and curling at the tip. They are mottled or spotted lavender, purple, and reddish in color, and each is up to 1. 5 centimeters long. There are 8 long stamens tipped with large anthers bearing blue-gray pollen. The stigma protrudes past the anthers. This species of Clarkia is very closely related to Clarkia virgata, and it has been suggested that it is not actually a separate species, but hybridization studies have demonstrated that there has been sufficient reproductive isolation to produce hybrid incompatibility between the two taxa, confirming that they should be treated as separate species.

Clarkia biloba is a species of flowering plant in the evening primrose family known by the common name twolobe clarkia. It is endemic to California, where it is known from the Sierra Nevada foothills; one subspecies can also be found in the San Francisco Bay Area. It grows in chaparral and woodland habitat. It is an annual herb producing an erect stem approaching a meter in maximum height. The leaves are linear to lance-shaped and up to 6 centimeters long. Each is borne on a short petiole. The top of the erect stem is occupied by the flower cluster, which bears hanging buds above open flowers. The pink or red-purple sepals remain fused as the petals spread and emerge from one side of the bud. The petals are up to 2.5 centimeters long and pink to lavender to magenta, sometimes flecked with red. Each petal has a two-lobed tip. There are 8 stamens, some with large lavender anthers and some with smaller, paler anthers. The stigma protrudes past the stamens. There are three subspecies of this wildflower. The rarest, the Mariposa clarkia (ssp. australis), is known only from the Merced River drainage, in the Sierra foothills, where it is threatened by road maintenance and non-native plants.

Twolobe Clarkia (Clarkia biloba ssp. biloba) is a native annual herb that grows in Central California, primarily in the Sierra Nevada Foothills and SF Bay regions. It tends to grow in , at elevations from 0-3300 feet.

Clarkia borealis is a rare species of flowering plant in the evening primrose family known by the common name northern clarkia. It is endemic to California, where it is known from the forests of the southern Klamath Range and the southernmost Cascade Range foothills. It is an annual herb growing an erect, slender stem. The leaves are oval in shape and borne on short petioles. The top of the stem is occupied by the inflorescence, in which the lowest flowers open first and hanging, pointed flower buds occur at nodes at the top. The sepals separate as the flower blooms, revealing purplish pink petals. Each petal is between 1 and two centimeters long, elongated triangular to semicircular in shape, and sometimes flecked with dark purple. There are 8 stamens with anthers bearing blue-gray pollen, and a protruding stigma. Both subspecies of this plant are rare. ssp. biloba is known from only about 20 occurrences in Shasta and Trinity Counties, and the even less common ssp. arida, the Shasta clarkia, is known only from the forests around Shingletown.

Clarkia bottae is a species of annual wildflower in the Onagraceae (Primrose) family. It is know by several common names, including punchbowl godetia, Botta's Clarkia, Botta's Fairyfan, and Hill Clarkia. Other Clarkias are known as Farewell-to-Spring, and some sources may apply that name to this species as well. This plant is endemic to the coastal plains, foothills and mountains, usually below 3,000 ft., from Santa Clara County to San Diego County, where it is a member of several plant communities. It produces spindly, waxy stems which may approach a meter in height but more often less, and sparse narrow leaves. The flower is a bowl shaped bloom with lavender or pinkish-purple petals, often lighter in color toward the base and speckled with red, each 1 to 3 centimeters long. The stigma protrudes from the corolla and is surrounded by shorter stamens. It is readily grown from seed and reliably re-seeds as long as it is not crowded out.

Clarkia breweri is a species of wildflower known by the common names fairy fans and Brewer's clarkia. This rare plant is endemic to California, where it is known from only seven counties in the central part of the state. It produces produces short stems under 20 centimeters in height and sparse, narrow leaves. The distinctive flowers have four pink to lavender petals, each about 2 centimeters long and wide, with 3 odd lobes, the middle lobe being long and spoon-shaped. This flower occurs in the chaparral plant community or in woodlands.

Clarkia concinna is a species of wildflower in the Onagraceae (Evening Primrose) family known as Red Ribbons. It is endemic to California, where it can be found in the northern Coast Ranges from Santa Clara County to Humboldt County, and in the Sierra foothills. This is an annual plant with erect, herbaceous stems. The distinctive flowers have four looping sepals of red or dark pink which look like loops of silk ribbon. The longer, pink petals have three lobes which are usually streaked with white.

Red Ribbons (Clarkia concinna ssp. concinna) is a native annual herb that grows in central and northern California. It tends to grow at elevations from 0-4900 feet.

Clarkia cylindrica is species of flowering plant in the evening primrose family known by the common name speckled fairyfan, or speckled clarkia. It is endemic to California, where it grows in the chaparral, woodlands and grassland of the coastal mountain ranges and Sierra Nevada foothills. This is an annual herb producing an erect stem to around half a meter in maximum height. Leaves are mainly linear in shape and up to six centimeters long. The flower cluster holds several flowers which hang heavily when they are buds and then grow erect as they open. Each open flower is a bowl of four fan-shaped petals up to about 3.5 centimeters long. The petals are intergrading shades of lavender, white, and magenta and they are often speckled with purple or pink. Beneath the petals are bright pink fused sepals. There are eight stamens with lavender anthers. The fruit is a cylindrical capsule up to 5 centimeters long.

Speckled Clarkia (Clarkia cylindrica ssp. cylindrica) is a native annual herb that grows in Southern and Central California, primarily in the South Coast Range, the South Coast and Transverse Range regions. It tends to grow in open grassy places, at elevations from 0-3300 feet.

Clarkia davyi is species of flowering plant in the evening primrose family known by the common name Davy's fairyfan, or Davy's clarkia. It is endemic to California, where it grows in coastal habitats such as beaches and bluffs. This is an annual herb producing a thin stem which grows along the ground or somewhat upright. It is lined with small oval-shaped leaves one or two centimeters long. While in bud the flower is enclosed in four fused thick sepals. It blooms into a petite bowl-shaped corolla of four pink petals which often have lighter bases. Each petal is 5 to 11 millimeters long.

Clarkia delicata is a rare species of flowering plant in the evening primrose family known by the common names Campo clarkia and delicate clarkia. It is native to northern Baja California and adjacent San Diego County, California, where it grows in the woodland and chaparral of the Peninsular Ranges. This is an annual herb producing an erect stem just over half a meter in maximum height. The leaves are oval or widely lance-shaped, up to 4 centimeters long, and borne on very short petioles. The top of the stem is occupied by the inflorescence, in which the lower flowers open while the upper buds hang closed. The sepals remain fused as the flower blooms from one side. Each unlobed oval petal is about a centimeter long and pink to pinkish-lavender. There are 8 stamens, some with large orange anthers and some with smaller, paler anthers. There is also a protruding stigma with four large, fuzzy lobes.

Clarkia dudleyana is a species of flowering plant in the evening primrose family known by the common name Dudley's clarkia. It is endemic to California, where it can be found in the mountains of the Transverse Ranges and the southern Sierra Nevada foothills. It grows in woodland, forest, and chaparral habitats under 1500 meters in elevation. This annual herb produces an erect stem sometimes exceeding half a meter in height. The leaves are lance-shaped, up to 7 centimeters long, and borne on short petioles. The top of the stem is occupied by the inflorescence, which has opening flowers below closed, hanging buds. As the flower blooms the pink to reddish-purple sepals remain fused, opening along one side only. The petals are up to 3 centimeters long, fan-shaped, pinkish lavender in color and sometimes flecked with red. There are 8 stamens, some of which have large lavender anthers and some that have smaller, paler anthers. The stigma protrudes farther than the stamens.

Clarkia epilobioides is a species of flowering plant in the evening primrose family known by the common name canyon clarkia. It is native to California, Arizona, and Baja California, where it grows in shaded habitat in woodland and chaparral. It is an annual herb producing a slender, erect stem sometimes exceeding half a meter in height. The leaves are narrowly to widely lance-shaped and less than 3 centimeters long. The top of the stem is occupied by the inflorescence. Each hanging bud has four red sepals which remain fused all together or in pairs as the petals emerge during blooming. The petals are one half to one centimeter long, oval in shape, solid white or cream in color, often fading pink as they age. There are eight protruding stamens and one stigma.

Clarkia exilis is a small herbaceous annual plant of western North America. It is an uncommon species in the evening primrose family known by the common names Kern River clarkia and slender clarkia. C. exilis is an annual herb producing a slender, erect stem often exceeding half a meter in height. The bright green leaves are lance-shaped to narrowly oval, hairless, up to 6 centimeters long, and sometimes lacking petioles. The top of the stem is occupied by the inflorescence, with open flowers and deflexed buds towards the tip of the stem. The sepals and ovary may be lightly hairy (but typically distinctly less so than its sister-species Clarkia unguiculata). The sepals will remain fused together along one side as the petals bloom. Each of the four petals has a narrow claw and diamond-shaped limb. The entire petal is up to 1. 5 centimeters long and white or soft purple or pink, sometimes with a purple spot. There are eight stamens, four of which have large reddish anthers and four with smaller, paler anthers. At maturity the style is equal to the stamens. The fruit is a capsule up to 3 centimeters long and about 2 millimeters wide that may contain from a few to 80 seeds. C. exilis is endemic to California, where it is known only from the woodlands of the southernmost Sierra Nevada foothills immediately northeast of Bakersfield and the adjacent Tehachapi Mountains. Populations are largely proximal to the Kern River and its nearby drainages, with some few populations found to the immediate west in the foothills of the Sierra as they descend to the Great Central Valley.

Clarkia franciscana is a rare species of flowering plant in the evening primrose family known by the common name Presidio clarkia. It is endemic to the San Francisco Bay Area of California, where it is known only from two populations at the Presidio of San Francisco and three occurrences in Oakland. The plant is known only from serpentine soils. Clarkia franciscana is a federally listed endangered species. The two San Francisco populations are on land which is protected from development but is affected by many other factors including invasive plant species, trampling, and landscaping of vegetation. The three Oakland populations are probably the remnants of one population that was fragmented by development in the heavily altered urban habitat. The largest of the three occurrences is partially protected at Redwood Regional Park, but the other two are on privately owned property which is proposed to undergo some development. Construction of housing is proposed on the site, with less than an acre being left undeveloped as a compromise between developers and environmental advocates. The Presidio clarkia, Clarkia franciscana, is an erect annual herb growing up to about 40 centimeters in maximum height. The leaves are narrowly lance-shaped and up to about 3. 5 centimeters long. The top of the stem is occupied by the inflorescence, which bears opening flowers and closed, erect flower buds. The sepals stay fused together as the petals bloom from one side. The small corolla is bowl-shaped, with petals up to 1. 3 centimeters long and wedge-shaped with mostly flat tips. The petals are lavender-pink in color, darkest at the tips and lightening to nearly white at the base, where there is a deep red spot. The plant is self-pollinating. The population sizes are variable from year to year; sometimes there are no plants seen at all, the seed banks remaining dormant until conditions improve.

Clarkia gracilis is a species of wildflower known by the common name slender clarkia. This plant is native to the US states of California, Oregon, and Washington, where it is found in coastal, foothill, valley, and low-elevation mountain habitats. The plant is variable across subspecies but is generally an erect slender stem with a few sparse, narrow leaves several centimeters long. It bears an flower cluster of drooping buds which open into bowl-shaped flowers with pinkish lavender petals 1 to 4 centimeters long and bearing a red or white splotch which can appear in the center or at the base of the petal, depending on the subspecies.

Whitestem Clarkia (Clarkia gracilis ssp. albicaulis) is a rare native annual herb that grows in Central and Northern California, primarily in the Cascade Range Foothills region. It tends to grow in open areas, at elevations from 0-4900 feet.

Slender Clarkia (Clarkia gracilis ssp. gracilis) is a native annual herb that grows in central and northern California. It tends to grow in open , at elevations from 0-4900 feet.

Clarkia heterandra is a species of flowering plant in the evening primrose family known by the common name mountain clarkia. It is endemic to California, where it is from the forests and woodlands of several of eastern and western mountain ranges. It is an annual herb producing an erect, glandular stem to around half a meter in maximum height. The lance-shaped to oval leaves are up to 8 centimeters long and are borne on petioles of up to 2 centimeters. The top of the stem is occupied by the inflorescence, with open flowers and closed buds. The sepals remain fused as the flower blooms from one side. The pink petals are oval in shape and just a few millimeters long. There are 8 stamens, some large and some small and sterile. The fruit is a small, hard body 2 or 3 millimeters long containing 1 or 2 seeds.

Clarkia imbricata is a rare species of flowering plant in the evening primrose family known by the common name Vine Hill clarkia. It is endemic to Sonoma County, California, where it is known from only one remaining natural occurrence near Vine Hill. A second natural population located on private land was extirpated when the owners plowed up the soil crust. The California Native Plant Society has established a third population from cuttings and is tending it in a reserve. This is a federally listed endangered species. Vine Hill clarkia is an annual herb growing erect to about half a meter in maximum height. The leaves are lance-shaped and about 2 centimeters long. The flower cluster is a dense array of open flowers and erect closed flower buds. The four sepals separate when the flower opens. The petals are fan-shaped with frilly edges, measuring 2 to 2.5 centimeters long. They are lavender with a wash of white near the base and a wedge of darker lavender above. There are 8 stamens with anthers of equal size, and a protruding stigma.

Clarkia jolonensis is an uncommon species of flowering plant in the evening primrose family known by the common name Jolon clarkia. It is endemic to Monterey County, California, where it is known from the woodlands of the Central Coast Ranges. This is an erect annual herb growing a hairless, waxy stem up to about half a meter in maximum height. The leaves are lance-shaped and a few centimeters long. The top of the stem is occupied by an erect inflorescence with opening flowers below an erect array of closed, hanging flower buds. The sepals of the bud remain fused as it opens into a bloom. The fan-shaped lavender petals are often flecked with red and tinted with pink, each measuring one or two centimeters long. There are 8 stamens, some of which have large lavender anthers, and some bearing smaller, paler anthers. This is an erect annual herb growing a hairless, waxy stem up to about half a meter in maximum height. The leaves are lance-shaped and a few centimeters long. The top of the stem is occupied by an erect inflorescence with opening flowers below an erect array of closed, hanging flower buds. The sepals of the bud remain fused as it opens into a bloom. The fan-shaped lavender petals are often flecked with red and tinted with pink, each measuring one or two centimeters long. There are 8 stamens, some of which have large lavender anthers, and some bearing smaller, paler anthers. This plant is very similar to, and historically confused with, Clarkia lewisii, which differs from C. jolonensis in that the former has a curved inflorescence with closely packed nodding flower buds, while the latter has an erect, widely spaced inflorescence. Some of the few known occurrences of this plant may actually be its sister species, making it rarer than officially listed.

Clarkia lassenensis is a species of wildflower known by the common name Lassen clarkia. This plant is native to the US states of California, Oregon, and Nevada, where it grows in the mountains and forested plateau. The plant erects a spindly stem and bears sparse narrow leaves. The bowl-shaped flower has four lavender petals with reddish bases, each about one centimeter long. The flower is a resident of Mount Lassen, from which it gets its name.

Clarkia lewisii is an uncommon species of flowering plant in the evening primrose family known by the common name Lewis' clarkia. It is endemic to California, where it is known from the hills and mountains of Monterey and San Benito Counties. It is an erect annual herb generally under half a meter in height. The lance-shaped leaves are a few centimeters long. The flower cluster bears opening flowers and closed, hanging flower buds. As the bud opens the pink or purple sepals stay fused as the petals bloom from one side. The fan-shaped petals are up to 3 centimeters long, pink to lavender with white and red coloration near the bases. There are 8 stamens and a protruding stigma.

Clarkia lingulata is a rare species of wildflower known by the common name Merced clarkia. This plant is endemic to Mariposa County, California, where it is known from only two sites near the Merced River. It is thought to have evolved very rapidly, outside the usual model of allopatric speciation, from its parental species Clarkia biloba. Clarkia lingulata erects a spindly stem rarely exceeding 0. 5 metres (1. 6 ft) in height and bearing sparse narrow leaves. The saucer-shaped flowers have four bright pink spoon-shaped petals 1 to 2 centimeters long and sometimes flecked with red. There are eight stamens with lavender anthers.

Clarkia mildrediae is an uncommon species of flowering plant in the evening primrose family known by the common name Mildred's clarkia. It is endemic to California, where it is known from the forests of the southernmost Cascade Range and northern Sierra Nevada. It is an erect annual herb often exceeding half a meter in height. The oval leaves grow up to 6 centimeters long and are borne on petioles of up to 4 centimeters. The inflorescence bears opening flowers and hanging, pointed flower buds. As the bud opens the sepals all separate instead of remaining fused as those of many other Clarkia species do. The triangular to semicircuclar petals are about 2 centimeters long and lavender to bright reddish-purple, sometimes with dark speckling. There are 8 stamens with anthers all alike, and a protruding stigma.

Clarkia modesta is a species of flowering plant in the evening primrose family known by the common name Waltham Creek clarkia. It is endemic to California, where it is known from the woodlands of several of the central mountain ranges, including the North and Central Coast Ranges and the Sierra Nevada foothills. It is an erect annual herb often exceeding half a meter in height. The oval, linear, or lance-shaped leaves are 2 to 4 centimeters long. The inflorescence bears opening flowers and closed, hanging flower buds. The sepals remain fused as the petals bloom from one side. The petals are about a centimeter long and vary in shape from diamond to widely lance-shaped. They are pale to deep pink and generally dark-flecked or spotted.

Clarkia mosquinii is a rare species of flowering plant in the evening primrose family known by the common name Mosquin's clarkia. It is endemic to California, where it is known only from the northern Sierra Nevada foothills at the border between Butte and Plumas Counties. It was thought to be extinct until it was rediscovered in 1991. It is an erect annual herb often exceeding half a meter in height. The oval or lance-shaped leaves are 2 to 5 centimeters long. The inflorescence bears opening flowers below a series of clusters of closed, hanging flower buds. The sepals all separate as the flower blooms. The diamond-shaped petals are one to two centimeters long light to medium purple in color, and sometimes speckled with reddish purple.

Clarkia prostrata is a species of flowering plant in the evening primrose family known by the common name prostrate clarkia. It is endemic to the coastline of San Luis Obispo County, California, where it grows on seaside bluffs in forested and grassy areas. This annual herb is prostrate as opposed to erect as most other Clarkia species are. Its stems extend to a maximum length approaching half a meter and are usually somewhat fuzzy in texture. The leaves are oval in shape, up to 2. 5 centimeters long, and lack petioles. The sepals of the flower separate into two pairs, revealing the lavender-pink blooming petals. Each petal is just over a centimeter long, fan-shaped to oval, and sometimes with a yellow base marked with a red spot.

Clarkia purpurea is a species of wildflower in the Onagraceae (Evening Primrose) family known by the common names Winecup Clarkia, Winecup Fairyfan, and Purple Clarkia. This plant is native to western North America where it is found in a variety of habitats. Within California it is very widespread, occurring all along the coast, in the Coast Ranges, Central Valley and Sierra foothills. There are three subspecies with differences in the flower color and with overlapping ranges. This plant erects a thin reddish stem which may approach a meter in height and has a few lance-shaped leaves. The bowl-shaped flowers have four petals usually one to two centimeters long and in shades of pink, purple, or deep wine red, often with a streak or spot of pink or red in the middle. In the garden it is almost always grown from seed and is included in many commercially available wildflower seed mixes.

Winecup Clarkia (Clarkia purpurea ssp. purpurea) is a native annual herb that grows in Northern, Southern and Central California, primarily in the Sacramento Valley, the San Joaquin Valley and Central Coast regions. It tends to grow in open, grassy or shrubby places, at elevations from 0-500 feet.

Clarkia (Clarkia purpurea ssp. quadrivulnera) is a native annual herb that grows in northern, southern and central California. It tends to grow in open, grassy or shrubby places, at elevations from 0-1600 feet.

Clarkia rhomboidea is a species of wildflower known by the common names diamond clarkia and forest clarkia. This plant is native to western North America, where it is a common resident of varied forest and woodland habitats. This clarkia grows a spindly stem not exceeding a meter in height and occasional small leaves. The flower has four petals which are bright pink to lavender and often speckled with darker pink shades. The petals are diamond-shaped to spoon-shaped and one to one and a half centimeters long. There are eight stamens, each holding a large anther bearing blue-gray pollen.

Clarkia rostrata is a species of flowering plant in the evening primrose family known by the common name beaked clarkia. It is endemic to California, where it is known from the woodlands of the Sierra Nevada foothills around the Merced River. This annual herb grows erect to about half a meter in maximum height. The lance-shaped leaves are up to about 6 centimeters long. The inflorescence bears opening flowers below closed, hanging flower buds. The reddish or purplish sepals stay fused together as the flower opens from one side. The fan-shaped petals are lavender-pink, lightening to nearly white at the bases, where it turns reddish purple. There are 8 stamens, some tipped with large lavender anthers and some with smaller, paler anthers.

Clarkia rubicunda is a flowering plant endemic to California. It is found mostly in the central part of the state. The plant is known by the common names ruby chalice clarkia and farewell to spring. It is similar in appearance to another flower of genus Clarkia also called farewell to spring. It bears attractive poppy-like blooms with wide, cup-shaped corollas of four pink or purplish petals. The corolla of the flower sometimes has a bright red center. As the common name suggests, it blooms in June and July.

Clarkia similis is a species of flowering plant in the evening primrose family known by the common name Ramona clarkia. It is endemic to California, where it is known from the coastal hills and mountains of the southwestern part of the state. It is an annual herb growing erect, approaching a meter in maximum height. The inflorescence bears open flowers and closed, hanging flower buds. The sepals remain fused as the petals bloom from one side. The petals are less than a centimeter long and oval to diamond in shape. They are pale pink with white near the bases, and sometimes purple-speckled.

Clarkia speciosa is a species of flowering plant in the Onagraceae (Evening Primrose) family known by the common name Red Spotted Clarkia. It is endemic to California, where it is known from the Central Coast and mountains and from the Sierra Nevada foothills. The plant is variable across its intergrading subspecies, taking a decumbent to erect form with a stem up to about half a meter long. The open or dense flower cluster has opening flowers and several closed buds. As the bud opens the sepals all separate from each other. The fan-shaped petals are up to 2.5 centimeters long and may be lavender to pink to deep red, sometimes fading to white or yellowish at the base. There is sometimes, but not always, a large bright red spot near the middle of the petal. There are four subspecies of this plant. One, ssp. immaculata (also sometimes called var. immaculata), is known as the Pismo clarkia and is federally listed as an endangered species. It is known from about 20 occurrences on the coastline of San Luis Obispo County near Pismo Beach. This subspecies takes a decumbent form and the petals lack the red spot.

Pismo Clarkia (Clarkia speciosa ssp. immaculata) is a rare native annual herb that grows in Central California, primarily in the Central Coast region. It tends to grow in sandy hills, at elevations from 0-2300 feet.